Simple Gauge Wiring Question

[ASUSMC]

Ok so I know some of you have done this. The boost gauge in my pillar is reading boost but i want to wire it now so it lights up at night. In my dads truck we just hooked it up to the headlight switch cause it was 2 screws and it popped out. How or where do I hook up the wiring so they are on a switch and I can turn them on with the headlights, or a separate switch?

[Viper_ed]

Just wire the white wire from the gause light into the dimmer wire from the headlight switch.

[ASUSMC]

I tried that but can't figure out how to get to it.

[Viper_ed]

I tried that but can't figure out how to get to it.

I haven't done mine in my Cobra yet, but I would assume you could pull the instrument cluster out to get to the wiring, or a simplier spot would be to hook it in at the radio cause the same dimmer wire can be found there also. The voltage will vary on the dimmer wire from 12 volt with the lights at their brightest setting and the voltage will get lower as you dim the lights.

[BurnTire]

You need to get a mini add a circuit form auto zone and power the gauge lights from the fuse that powers the dash lights. It will dim with the dash lights.

[Viper_ed]

You need to get a mini add a circuit form auto zone and power the gauge lights from the fuse that powers the dash lights. It will dim with the dash lights.

Why not just tap the dimmer circuit? Surely 1 extra light won't overload it.

[BurnTire]

You could, but I am all about being easy. LOL

[Viper_ed]

You could, but I am all about being easy. LOL

So making a trip to the parts store and spending money is easier than just splicing a wire?

[BurnTire]

I used slot 37 Adjustable illumination.
You plug the add a circuit in to slot 37.

Power what ever you want to dim. I have the boost and fuel back lighting powered.
This will allow you to increase the fuse size and no wire splicing.

[ASUSMC]

How much is one of them things? And is it just plug into that and run the wires directly to it and it dims?